Subtract 40/49 from 70/42, Solve 1 28/42

Subtract 40/49 from 70/42

1^st number: 1 28/42, 2^nd number: 40/49

70/42 - 40/49 is 125/147.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 49 is 294

Next, find the equivalent fraction of both fractional numbers with denominator 294
For the 1st fraction, since 42 × 7 = 294,
70/42 = 70 × 7/42 × 7 = 490/294
Likewise, for the 2nd fraction, since 49 × 6 = 294,
40/49 = 40 × 6/49 × 6 = 240/294
Subtract the two like fractions:
490/294 - 240/294 = 490 - 240/294 = 250/294
After reducing the fraction, the answer is 125/147

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